Finding the Fourth Proportional to 9,347.37, 12,899.42 and 5,155.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,347.37 : 12,899.42 = 5,155.62 : x
2. Step 2: Convert to fraction form
   9,347.37/12,899.42 = 5,155.62/x
3. Step 3: Cross multiply
   9,347.37x = 12,899.42 × 5,155.62
4. Step 4: Simplify right side
   9,347.37x = 66,504,481.96
5. Step 5: Solve for x
   x = 66,504,481.96/9,347.37
6. Step 6: Final answer
   x = 7,114.78